Caster boot



FIG. 1 is a perspective view of caster boot showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation thereof, the left side elevation beinga mirror image thereof;

FIG. 5 is a front elevation thereof; and,

FIG. 6 is a rear elevation thereof.

The broken line showing of a latch is for illustrative purposes only andforms no part of the claimed design.

The ornamental design for a caster boot, as shown and described.